A cyclist moving on a circular track of radius 40 m completes half a revolution in 40 sec average velocity is ................ .

A cyclist moving on a circular track of radius 40 m completes half a r

1.	A cyclist moving on a circular track of radius 40 m completes half a revolution in 40 sec average velocity is ................ .
Answer» 0 `2 m // s` `4 m // s` `2pi m // s` SOLUTION :Displacement of the cyclist in half revolution is, d = diameter of the circular track i.e., d=80 m Average velocity, `V=("Total displacement")/("Total time")=(80)/(40)` `V=2 m // s`